Improvement in watches



f E. G. BOYNETT.

WATCH.

Patented .1'.ue19,1877.

NJETERS, FHDTO-LITHGGHAPHER. WASHINGTON, D C.

UNr'rED STATES PATENT- QFFIGE.

EDWARD G. BOYNETT, OF JERSEY CITY, NEW JERSEY.

IMPROVEMENT IN WATCHES.

Specification forming part of Letters Patent No. 192,222, dated June 19,1877; application tiled May 2, 1877.

To all whom yit 'may concern:

`Be it known that I, EDWARD G. BoYNn'r'r, of Jersey City, in lthe countyot' Hudson and State of New Jersey, have invented a new and usefulImprovement in VatCheS; and I do hereby declare that the following is afull, clear, and exact description ot' the same, ret'- erence being hadto the accompanying drawing, forming part of this specification.

It is well known that a \vateh-movement, to keep time with the mostfperfeet accuracy, should be always kept in the same position, and thatitl regulated in one position it will not go so accurately in anotherposition.

The object of this inventionl is to provide for keeping the movementalways in the same position, whether the watch be carried in the pocketor whether it be hung up when not so carried; and to this end theinvention consists in applying the movement within the case ot' thewatch upon ah central pivot, upon which it is free to rotate oroscillate, so that the heaviest part or center otl gravity of themovement will always i'all below the said pivot, when the watch iscarried, suspended, or placed in an upright, or approximately upright,position, without regard to which part ot' the case is uppermost.

The invention is illustrated in the accompanying drawing, in whichFigure 1 is a central section ot' as much ot' a watch as is necessaryfor the illustration. Fig. 2 is ariew of the inside ot the back of thecase, showing the position ot' the central pivot. Fig. 3 isa back viewof the movemcntdetached from the case.

In this example of my invention, the eentral pivot a, upon which themovement hangs vand swings when the watch is upright or on edge, andwhich is attached securely to the inner back B ofthe case, enters into acentral bearing provided in the center arbor c, which carries the centerpinion e and minute-handf of the watch. In order to provide for thisbearing in the center arbor c, the rear portion of the said arbor ismade somewhat larger than usual, and bored centrally from the rear end,the central bore constituting the bearings. A is the principal plate ot'the movement. C is the bridge, which receives the rear pivot ot' thecenter arbor c, and D is the dial.

By making the bearing for the central pivot a in the center arbor c, thenecessity ot making the watch any thicker is obviatcd or reduced;otherwise the bearing for the central pivot might be provided withoutaltering the 'working parts ofthe movement.

The central pivot a. might be attached rigidly to the movement, and turnin a bearing in the case. I, however, prel'er the construction shown.

It will be readily understood that when the movement is thus arranged ona central pivot, if the center ot' gravity of the movementis at anydistance from the center arbor c, it must always fall below the centralpivot ay when the watch is suspended or set up edgewisc, and that,therefore, the movement will then always occupy the same positionwithout respect to which part ot the case is upward or downward.

What I claim as my invention is- A watch hav-ing its movement placed ona central pivot, on which it is i'rce to oscillate or rotate,substantially in the manner and for the purpose herein described.

EDWARD G. BOYNE'IT.

Witnesses:

BENJAMIN W. HOFFMAN, EDWARD B. SPERRY.

